Smart hydrogen storage operation and power-to-power routes

Eco-Energy World (EEW) plans to combine its existing 300 MW solar power plant in Raglan (Queensland, Australia) with a 200 MW electrolyser plant and 100 MW of battery storage by the end of 2023. The hydrogen plant is designed to produce 33 000 tonnes of green hydrogen per year. The system will use battery storage to optimise operations (Renews, 2021).

In another example, the Delta Green project in France produces and stores green hydrogen during periods of high renewable energy production, and then converts the hydrogen back into electricity during peak-load hours (Construction21 France, 2018).

A demonstration project utilises the abundant wind power on Dachen Island in the East China Sea to produce green hydrogen through proton exchange membrane electrolysis technology, and has constructed a co-generation system comprising hydrogen production, hydrogen storage and fuel cells. It is the first comprehensive green hydrogen demonstration project on an island in China. The project promotes the clean energy consumption and power flow optimisation of power grids on the island and achieves 100% consumption of clean energy and zero-carbon energy supply throughout the process. It is expected to consume 365 000 kWh of surplus wind power every year and produce 73 000 normal cubic metres (Nm3) of hydrogen, which can generate about 100 000 kWh of electricity and reduce 73 tonnes of carbon dioxide emissions. The hydrogen storage is expected to act as a large power bank, and meet electricity demand on Dachen Island during peak electricity consumption and emergency maintenance.